(http://www.msvistablog.com/) Back in 2005, TechRepublic published a quiz on tweaking and troubleshooting the performance of Microsoft Windows XP. The results of the quiz were very revealing. It turned out that many taking the quiz failed to answer the majority of the questions correctly.Now, some three years later, it is time to see just how well you know your Windows XP performance. We have republished the quiz in the Microsoft Windows blog and invite you to test you skills once again.The quiz is a standard Macromedia Flash file so you will need to have Flash Player installed on your PC.